Saw blade

Abstract

A saw blade includes a body ( 1 ) being formed symmetrically about a longitudinal center plane ( 8 ). A plurality of spaced apart unset teeth is formed symmetrically along the longitudinal center plane of the body in at least one recurring cycle of teeth. The at least one recurring cycle of teeth includes at least one first group of teeth and at least one second group of teeth. The at least one first group of teeth includes at least two first teeth ( 2 ). The height of one first tooth ( 2 ) is different than the height of one other first tooth ( 2 ). The width of one first tooth ( 2 ) is different than the width of one other first tooth ( 2 ). The at least two first teeth ( 2 ) each include at least one effective cutting edge ( 5 ) having at least one phase ( 7 ). The at least one second group of teeth includes at least two second teeth ( 2 *). The heights of the second teeth ( 2 *) are approximately identical and the widths of the second teeth ( 2 *) are approximately identical. The common height of the second teeth ( 2 *) is less than the smallest height of the first teeth ( 2 ) and the common width of the second teeth ( 2 *) is more than the greatest width of the first teeth ( 2 ). The at least two second teeth ( 2 ) each include one effective cutting edge ( 5 *) having a width and being designed to be continuous and straight along its width.

We claim:  
     
         1 . A saw blade, comprising: 
 a body being formed approximately symmetrically about a longitudinal center plane; and    a plurality of spaced apart unset teeth being formed approximately symmetrically along the longitudinal center plane of said body in at least one recurring cycle of teeth, 
 said at least one recurring cycle of teeth including at least one first group of teeth and at least one second group of teeth,  
 said at least one first group of teeth including at least two first teeth each having a height and a width, the height of one first tooth being different than the height of one other first tooth and the width of one first tooth being different than the width of one other first tooth, said at least two first teeth each including at least one effective cutting edge having at least one phase,  
 said at least one second group of teeth including at least two second teeth each having a height and a width, the height of said second teeth being approximately identical and the width of said second teeth being approximately identical, the height of said second teeth being less than the smallest height of said first teeth and the width of said second teeth being more than the greatest width of said first teeth, said at least two second teeth each including one effective cutting edge having a width and being designed to be continuous and straight along its width.  
   
     
     
         2 . The saw blade of    claim 1   , wherein said cutting edges of said first and second teeth are designed and arranged to cut approximately the same chip volume from a cutting channel of a work piece to be cut.  
     
     
         3 . The saw blade of    claim 1   , wherein said cutting edges of said first and second teeth are designed and arranged to cut chips having approximately the same width from a cutting channel of a work piece to be cut.  
     
     
         4 . The saw blade of    claim 1   , wherein all of said first and second teeth are unset.  
     
     
         5 . The saw blade of    claim 1   , wherein at least one second tooth is arranged between two adjacent first teeth.  
     
     
         6 . The saw blade of    claim 1   , wherein each of said second teeth includes a flank being arranged at an angle of less than 90 degrees with respect said cutting edge.  
     
     
         7 . The saw blade of    claim 1   , wherein said phase of each of said first teeth is located at a phase angle with respect to a line extending perpendicular to the longitudinal center plane.  
     
     
         8 . The saw blade of    claim 7   , wherein the phase angles of said first teeth are approximately identical.  
     
     
         9 . The saw blade of    claim 6   , wherein said second teeth of said second group have a round design between said cutting edge and said flank.  
     
     
         10 . The saw blade of    claim 1   , wherein at least said second teeth of said second group have a width being more than the width of said body.  
     
     
         11 . The saw blade of    claim 6   , wherein said flanks of said second teeth of said second group are arranged at a flank angle of between approximately 3 degrees and 12 degrees.  
     
     
         12 . The saw blade of    claim 6   , wherein said flanks of said second teeth of said second group are arranged at a flank angle of approximately 8 degrees.  
     
     
         13 . The saw blade of    claim 1   , wherein said first and second teeth include a ground hard metal element.  
     
     
         14 . The saw blade of    claim 1   , further including a plurality of additional groups of teeth having a recurring, variable pitch.  
     
     
         15 . The saw blade of    claim 14   , wherein the number of teeth in said additional groups of teeth is not identical to the number of teeth in said first and second group.  
     
     
         16 . A saw blade, comprising: 
 a body including an elongated edge portion and being formed approximately symmetrically about a longitudinal center plane; and    a plurality of spaced apart unset teeth being formed approximately symmetrically along said elongated edge portion and along the longitudinal center plane of said body in at least one recurring cycle of teeth, 
 said recurring cycle of teeth including at least one first group of teeth and at least one second group of teeth,  
 said first group of teeth including at least two unset first teeth each having a height and a width, the heights of said first teeth being different and the widths of said first teeth being different, said first teeth including at least one effective cutting edge having at least one phase,  
 said second group of teeth including at least two unset second teeth each having a height and a width, the heights of said second teeth being approximately identical and the widths of said second teeth being approximately identical, the height of said second teeth being less than the heights of said first teeth and the width of said second teeth being more than the widths of said first teeth, said second teeth each including one effective cutting edge having a width and being designed to be continuous and straight along its width.  
   
     
     
         17 . The saw blade of    claim 16   , wherein said first teeth of said first group and said second teeth of said second group are connected to said body in an uniformly intermixed arrangement.  
     
     
         18 . The saw blade of    claim 16   , wherein said second teeth are arranged between two adjacent first teeth.  
     
     
         19 . The saw blade of    claim 16   , wherein at least said second teeth have a width being more than the width of said body.  
     
     
         20 . The saw blade of    claim 16   , wherein said saw blade is designed as a band saw blade.